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| Autor: | Cefola, Michael |
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| Předmět: | |
| Zdroj: | Astronomy; Mar2016, Vol. 44 Issue 3, p20-20, 1/5p |
| Abstrakt: | A letter to the editor is presented in response to the article "Double trouble" in the November 2015 issue. |
| Databáze: | Complementary Index |
| Externí odkaz: |
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